| Autor: |
Yao-Kwang Lin, Meng-I Lin, Lee-Jene Lai, Tieh-Chi Chu |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Solid State Communications. 144:181-184 |
| ISSN: |
0038-1098 |
| DOI: |
10.1016/j.ssc.2007.08.028 |
| Popis: |
The photoluminescence (PL) properties and crystalline structure of undoped and erbium ion (Er 3+ )-doped zirconia (ZrO 2 ) that were prepared by sol–gel methods were examined. The ZrO 2 films exhibited a dopant concentration-dependent crystalline phase. As the Er 3+ ions’ concentration increases, the amount of monoclinic phases of ZrO 2 declines. However, the proportion of the tetragonal phase of ZrO 2 is enhanced. This fact suggests that Er 3+ ions replace the Zr 4+ ions and cause the phase transition in the host lattice of ZrO 2 . Photoluminescence bands were observed by exciting the film at 300 eV with soft X-rays. Experimental results showed that the PL emission bands of Er +3 -doped ZrO 2 films can be tuned by controlling the Er 3+ concentration. In particular, with increasing Er 3+ concentration, the blue bands are quenched whereas the green and red bands are enhanced. This phenomenon can be explained as a non-radiative energy transfer. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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